Solutions by everydaycalculation.com
1042 - 1642 is -17.
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Related: 20/42-16/42 10/42-32/42 10/84-16/42 10/42-16/84 30/42-16/42 10/42-48/42 50/42-16/42 10/42-80/42 70/42-16/42
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